Biotin (B7)

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Last updated 2:32 PM on 9/17/26
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8 Terms

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Biotin structure

Ureido ring fused with a tetrahydrothiophene ring + valeric acid side chain

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Biotin Active Form

Biocytin (bound to

carboxylases)

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Biotin RDA and UL

Men and Women: 30mcg/day

Pregnancy/Lactation: 30-35 mcg/day

UL: none established

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Biotin Rich Food Sources

Eggs (cooked), liver, nuts, seeds, sweet potatoes, salmon

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Biotin Metabolic Functions

Carboxylation reactions in gluconeogenesis (pyruvate carboxylase) and fatty acid synthesis (acetyl-CoA carboxylase).

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Biotin Insufficiency Effects

halts glucose generation

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Biotin Deficiency Symptoms

Hair thinning/loss, scaly red rash around eyes/mouth/nose, depression, lethargy, hallucinations

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Biotin Deficiency at risk population

Raw egg white consumers (avidin binding), biotinidase deficiency, pregnant women.